This seems to be coming from /usr/include/rpcsvc/yp_prot.h, shipped by libnsl-dev: ... configure:30653: checking for rpcsvc/ypclnt.h configure:30653: x86_64-linux-gnu-g++ -c -I/usr/include/p11-kit-1 -g -O2 -fdebug-prefix-map=/home/ubuntu/deb/squid/squid-4.13=. -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -I/usr/include/libxml2 conftest.cpp >&5 configure:30653: $? = 0 configure:30653: result: yes configure:30653: checking for rpcsvc/yp_prot.h configure:30653: x86_64-linux-gnu-g++ -c -I/usr/include/p11-kit-1 -g -O2 -fdebug-prefix-map=/home/ubuntu/deb/squid/squid-4.13=. -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -I/usr/include/libxml2 conftest.cpp >&5 In file included from conftest.cpp:164: /usr/include/rpcsvc/yp_prot.h:10:10: fatal error: rpc/rpc.h: No such file or directory 10 | #include <rpc/rpc.h> | ^~~~~~~~~~~
This seems to be coming from /usr/include/ rpcsvc/ yp_prot. h, shipped by libnsl-dev: linux-gnu- g++ -c -I/usr/ include/ p11-kit- 1 -g -O2 -fdebug- prefix- map=/home/ ubuntu/ deb/squid/ squid-4. 13=. -fstack- protector- strong -Wformat -Werror= format- security -Wdate-time -D_FORTIFY_SOURCE=2 -I/usr/ include/ libxml2 conftest.cpp >&5 linux-gnu- g++ -c -I/usr/ include/ p11-kit- 1 -g -O2 -fdebug- prefix- map=/home/ ubuntu/ deb/squid/ squid-4. 13=. -fstack- protector- strong -Wformat -Werror= format- security -Wdate-time -D_FORTIFY_SOURCE=2 -I/usr/ include/ libxml2 conftest.cpp >&5 rpcsvc/ yp_prot. h:10:10: fatal error: rpc/rpc.h: No such file or directory
...
configure:30653: checking for rpcsvc/ypclnt.h
configure:30653: x86_64-
configure:30653: $? = 0
configure:30653: result: yes
configure:30653: checking for rpcsvc/yp_prot.h
configure:30653: x86_64-
In file included from conftest.cpp:164:
/usr/include/
10 | #include <rpc/rpc.h>
| ^~~~~~~~~~~